We __________ so tired. We've only been to a party.
| A．mustn't have felt | B．wouldn't have felt |
| C．shouldn't have felt | D．couldn't have felt |
We are confident that the environment __________ by our further efforts to reduce pollution.
| A．had been improved |
| B．will be improved |
| C．is improved |
| D．was improved |
I didn't think I'd like the movie, but actually it __________ pretty good.
| A．has been |
| B．was |
| C．had been |
| D．would be |
Shakespeare's play Hamlet __________ into at least ten different films over the past years.
| A．had been made |
| B．was made |
| C．has been made |
| D．would be made |
A big fire __________ last night. Who should __________ for it?
| A．took place; be to blame |
| B．was broken out; be to blame |
| C．happened; be to be blamed |
| D．broke out; be to blame |
They are living with their parents for the moment because their own house __________.
| A．is being rebuilt |
| B．has been rebuilt |
| C．is rebuilt |
| D．has rebuilt |